Method of forming and applying tubular back linings to fillers



Jan. 7, 1969 J. H. THORP 3,420,723

METHOD OF FORMING AND APPLYING TUBULAR BACK LININGS TO FILLERS FiledNov. 50, 1964 i INVENTOR.

JAMES H. THORP ATTORNEYS United States Patent 2 Claims ABSTRACT OF THEDISCLOSURE A two-part tubular back-liner is formed from a conventionalflat back-liner with subadjacent headband segments attached and a secondpaper back-liner with inwardly folded side edge portions. The marginalside edge portions are adhesively attached to the fiat back-liner.

This invention relates to a method for back lining book fillers, anddeals more particularly with an improved method for forming and applyinga tubular back lining to a filler.

The general object of the present invention is to provide a method offorming and applying tubular back linings to filler-s, which method isparticularly well adapted to use in automatic machines which can actupon a large number of fillers in succession.

Another object of the present invention is to provide a method offorming and applying tubular back linings to fillers, which method usesa minimum amount of backlining material.

Still another object of the present invention is to provide a method offorming and applying tubular back linings to fillers, which method isparticularly well suited to the simultaneous application of headbands tothe backs of said fillers adjacent the end portions thereof.

The drawing shows a preferred form of the method of the invention andsuch method will be described, but it will be understood that variouschanges may be made from the method disclosed, and that the drawing anddescription are not to be construed as defining or limiting the scope ofthe invention, the claims forming a part of this specification beingrelied upon for that purpose.

Of the drawing:

FIG. 1 is a diagrammatic prespective view of an apparatus for practicingthe method of the present invention.

FIG. 2 is a sectional View of a strip of back-lining paper as it is fedfrom its supply roll and is taken along the line 22 of FIG. 1.

FIG. 3 is a sectional view of the strip of back-lining paper of FIG. 2after it has been folded and is taken along the line 3-3 of FIG. 1.

FIG. 4 is a perspective view of the book filler of FIG. 4 showing partsof the tubular back lining in disassembled relation to reveal the methodby which it is constructed.

FIG. 5 is an end view, partly in section, of a filler which has had atubular back lining applied thereto according to the present invention.

Turning now to the drawings in greater detail, a plurality of bookfillers 10, are shown in FIG. 1 as being fed along a generallyhorizontal longitudinal path by suitable carrier means, indicatedgenerally at 12. As shown, the fillers are carried edgewise inside-by-side spaced relationship with their backs facing upwardly. Itwill be appreciated, however, that such orientation is not essential andthat other configurations may be adopted without departing from thescope of the present invention.

At a first station, indicated generally at 14, a glue applying rollerpasses generally horizontally across "ice the filler back to deposit athin film of glue thereupon. The roller 15 may be coated with glue byany one of several well known methods and as shown the roller 15 has aconcave peripheral surface to conform at least approximately to therounded back of the filler 10.

At the next succeeding station in the schematic apparatus shown in FIG.1, the glue filler 10 is provided with a fiat segment of back-liningpaper, indicated generally at 16, by a vertically reciprocable conveyor18. While the segment 16 may be fed to this station from a magazine orhopper filled with similar segments; preferably and as shown, suitablemechanism is provided for forming the segment immediately above thestation. The mechanism shown comprises a first roll of paper back-liningmaterial indicated generally at 30 and two rolls of relatively narrowheadband material indicated generally at 28, 28. Suitable means areprovided for rotating these rolls in the directions indicated.

According to the preferred method of forming the flat back-liningsegment 16, the roll 30 is unrolled into a flat sheet 26 and two thinstripes of glue are applied to the marginal side edge portions,indicated generally at 26a, 26a by glue rollers 32, 32. Continuousstrips of headband material 22, 22 are fed from the rolls 28, 28 andadhesively attached to the paper sheet 26 as shown. The paper sheet 26and the roll 30 from which it is fed, are approximately equal in widthto the length of the book filler to be glued.

A knife blade 34 is movable in timed relation with the movement of theconveyor 18, and with the movement of the sheet 26, so that the latteris successively cut to produce segments 16, 16 approximately equal inlength to the thickness of said fillers. The conveyor 18 moves each suchsegment 16 into registered engagement with the glued back of the filler10 positioned therebelow.

It will be apparent that the flat paper back-lining segment 16 can bepressed onto the filler back by suitable means (not shown).

At a succeeding station, indicated generally at 36 in FIG. 1, twoaxially thin glue rollers 38, 38 pass along the back of the filler 10 toprovide narrow bands of glue adjacent the side edges of the back of thesegment 16. Preferably, and as shown, the axes of rotation of theserollers are canted so that the peripheries of the rollers 38, 38properly engage the rounded back portion of the filler 10.

At still another subsequent station, indicated generally at 40, a secondor outer section of back-lining paper 42 is applied to the back of thefiller. Preferably, and as shown, this paper back-lining section 42 isformed in the machine above the station 40 and is lowered into positionby a second conveyor 44. A second roll of back-lining paper 46 isunrolled into a sheet 48 and is drawn through a plow, indicatedgenerally at 50, to form a continuous strip of back-lining paper havinginwardly folded marginal side edge portions 52, 52 which are foldedthrough approximately so that the resulting strip has the same widthwhen folded as the thickness of said fillers 10, 10. In accordance withthe present invention, the sheet 48 and the roll 46 from which it is fedare wider than the thickness of said fillers but no wider than twicethis dimension. It has been found that a width of approximately one andone-half times the thickness of the fillers to be back lined hasprovided marginal side edge portions 52, 52 of optimum width.

A knife blade 54 is adapted to cut the folded sheet of back-lining paper48 into sections 42, 42 which are at least approximately equal in lengthto that of said fillers. The back-lining section 42 is then moveddownwardly into registered engagement with the back of the filler 10 bythe conveyor 44. The marginal side edge portions 52, 52 are thusadhesively attached to the marginal side edges of the flat back-liningsegment 16 by the films of glue deposited at the station 36. In thismanner, a tubular back lining is formed by a process which lends itselfparticularly well to use in an automatic machine which can act upon alarge number of fillers in succession.

Here too, it will be apparent that the folded paper backlining section42 can be pressed onto the filler back by suitable means (not shown).

FIG. 4 shows the various parts of the book filler in disassembledrelation and illustrates some of the advantages achieved in constructinga tubular back lining according to the method of the present invention.The in dividual registering of the headband strip segments 22a, 22a withrespect to a filler back is avoided by applying the continuous strips22, 22 to the sheet 26 and subsequently cutting such sheet into segments16, 16 such as that shown in FIG. 4. Further, the folded back-liningsection 42 is registered with the flat segment 16 to provide a tubularback lining which is well adapted to low cost quantity production.

The invention claimed is:

1. The method of forming and applying twopart tubular back linings tofillers, which method comprises the steps of unrolling back-lining paperfrom a first roll which has a width approximately equal to the length ofthe fillers, attaching two continuous strips of headband material to aninner surface of said back-lining paper adjacent the marginal side edgesthereof, cutting said backlining paper and the headband strips attachedthereto into segments approximately equal in length to the thickness ofsaid fillers, adhesively attaching said segments to the backs of saidfillers, unrolling back-lining paper from a second roll which is widerthan the thickness of said fillers but no wider than twice thisdimension, 'folding the marginal side edge portions of said lastmentioned back-lining paper inwardly through substantially 180 to form acontinuous strip having a folded width approximately equal to thethickness of said fillers, cutting said strip of folded back-liningpaper into second paper back-lining sections approximately equal inlength to the lengths of said fillers, adhesively attaching said foldedside edge portions of said sections to said filler backs in registeredrelation with said segments to provide two-part tubular back linings onsaid fillers.

2. The method of forming and applying two-part tubular back linings tofillers, which method comprises the steps of fee-ding fillers ofuni-form size along a predetermined path applying glue to the back ofeach filler, unrolling back-lining paper from a first roll which has awidth approximately equal to the length of said fillers, attaching twocontinuous strips of headband material to an inner surface of saidback-lining paper adjacent the iarginal side edges thereof, cutting saidback-lining paper and the headband strips attached thereto into segmentsapproximately equal in length to the thickness of said fillers, movingsaid segments of back-lining paper into registered engagement with thebacks of said fillers, unrolling back-lining paper from a second rollwhich has a Width of approximately one and one-half times the thicknessof said fillers, folding the marginal side edge portions of said lastmentioned back-lining paper inwardly to form a continuous strip ofback-lining paper having the same width when folded as the thickness ofsaid fillers, cutting said strip of folded back-lining paper into secondpaper back-lining sections approximately equal in length to that of saidfillers, and adhesively attaching said folded side edge portion of saidsections to said filler backs in registered relation wit-h said segmentsto provide two-part tubular back linings on said fillers.

References Cited UNITED STATES PATENTS 1,864,766 6/1932 Schmidt 156552XR 1,867,803 7/1932 Bredenberg 111 2,283,137 5/1942 Fine 156202 EARL M.BERGERT, Primary Examiner.

H. F. EPSTEIN, Assistant Examiner.

US. Cl. X.R.

